The plateau in a cardiac muscle action potential is due to ____________________.
slow calcium channels
fast sodium channels
leak potassium channels
fast potassium channels
all the choices are correct
slow calcium channels
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The systemic circuit
A. brings oxygen-rich blood from the tissues. B. sends oxygen-poor blood to the heart. C. sends oxygen-rich blood to the tissues. D. brings oxygen-poor blood from the lungs.
Because cardiac muscles are mechanically, chemically, and electrically connected to one another, cardiac muscle functions as a single enormous fiber, i.e., a ________.
Fill in the blank(s) with the appropriate word(s).
What is the name of cranial nerve VIII?
A) vestibulocochlear nerve B) facial nerve C) glossopharyngeal nerve D) trigeminal nerve
Describe the function of the caudate nucleus
A) The caudate nucleus is involved with sensory input from various somatic sensory receptors. B) The caudate nucleus is involved with indirect modification of movement by output to the cerebral cortex. C) The caudate nucleus is involved with speech production. D) The caudate nucleus is involved with the subconscious adjustment and modification of skeletal muscle activity. E) The caudate nucleus is involved in the direct control of voluntary movements by controlling somatic motor neurons in the brainstem and spinal cord.